To incorporate the results of DCNA research and achieve more comprehensive distributed processing, the Nippon Telegraph and Telephone Public Corporation (currently NTT) conducted research and development on a 7400-based communications control processor (CCP) as a CCP for the DIPS-11/5 Series. This was expanded to two models -- the 7400 and 7410 -- and functions for independent operation were added to also enable use as a node processor in a network. Prototyping of the 7410 was finished in December 1979, and that of the 7400 was finished in February 1980 (DIPS Communications Control Processor Main Specifications).
| Item | 7300CCP | 7400CCP | 7410CCP | Remark |
|---|---|---|---|---|
| Number of instructions | 68 | 81 | 81 | *DIPS architecture |
| Maximum operation width (bit) | 19 | 20 | 20 | |
| Maximum amount of memory (MB) | 0.5 | 1 | 1 | |
| Maximum throughput (kchar/sec) | 5 | 5 | 10 | |
| Maximum number of lines 1200 bit/sec 48 K bit/sec |
256 bit/sec 8 bit/sec |
128 bit/sec 4 bit/sec |
256 bit/sec 8 bit/sec |
Full duplex lines |
| Line type | Special communication lines/public communication lines/DDX | |||
| Synchronization system | Start-stop synchronization/SYN synchronization/frame synchronization | |||
| Line speed (bit/sec) | 50_240 K | 50_48 K | ||
| Interface with host | Channel connection using DIPS IO interface | |||
| Maximum number of host connections | 2 | 4 | 4 | |
| Input/Output unit | Input/Output unit for NTT Public Corporation terminals | |||
| Storage unit | Unit for DIPS mid/large-size machines | Small unit for commercially available mini computers | ||
